I downloaded directly from Apple the itunes 10.7 and still not working

I was trying to connect and ipod touch to my mac, it told me I needed the newer version of itunes and for that I needed to update to the latest version of OS X. I have the Lion 10.7 now and the itunes 10.7. After installing it tells me the installation was successful, but when I try to open it gives me the error message bellow. Please help!!